Automatic brake.



No. 883,637. PATENTEI) MAR. 31, 1908. J. E. FROST.

AUTOMATIC BRAKE.

APPLICATION FILED JULY 8. 1907.

2 SHEIZTB-BEBET 1.

gnbentoz UNITED STATES -1 ATENT onrron.

JOSEPH E FROST, OF NEWMAN GROVE, NEBRASKA.

AUTOMATIC BRAKE no. sense? Specification of Letters Patent.

Pa i: sited March '31., 1 1908.

Application flledJ'uly 8, 1907. Serial No. 882,671.

flewlnun Grove, in the county of Mad son, State of Nebraska, haveinvented cerium new end useful Improvements in Autr'mmlic Brakes and Ido hereby declare the following to be a full, clear, and exact descri)tion of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

The present invention has reference to im,

provements in eutomaticbrakes, and its obect consists in the prov sionof an exceedingly simple, as well as, mexpenslve device, for effectivelycontrolling the brakes upon threshing or similar machines, propelled bya traction engine.

To this end the invention resides in the particular construction,combination, and

arrangement of parts, all as hereinafter fully described,specihcaliyxclaimed, and illustrated in the accompenyin r drewings, inwhich like rpm-ts are designated by correspondini; reference charactersthroughout the severe Of the said drawings, Figure 1 is a side elevationof an engine-drawn threshing nachine equipped with the presentinvention, Fig. 2 is e ottom plan view thereof, and,

Fig. 3 is an enlarped detail view of the threeway valve. In shown. insection.

Referring more perticulerly'to the drawings thennmeral 5 designatesgenerally the traction engine, while the numeral 6 indic-stes in eslmilar manner the threshing machine, which letter carries a cylinder 7,at-

ig. 2 the piston cylinder is tached thereto by bolts which assthroughperforated brackets 8, dispose upon opposite sides of thecylinder in WllOSG forward head 9 isformed an inlet port in which oneend of a. section of hose 10 is fitted, the oppo'site end of which isconnected to a. pipe 11-, for conveying steam or other fluid fromtheengine, said pipe being provided with a:

three-way valve 12, of conventional type.

Disposed within the cylinder is a piston "13 whose stem, 14 projectsthrough a bearing 15 formed in the rear end of the cylinder and ispivoted to a horizontal lever 16 fulcrumed intermediate its ends-uponthe threshing machine, the outer extremity ofsaid lever being connectedto the adjacent bracket 8, b e retract-lie coil-spring 17. The inner endo the said lever is pivoted to the forward end of a horizontal link 18,the rear end of which views.

l latter secured to n cross-bar 19 provided I each end with. a brakeshoe 2U mlnpted to bear against the adjzu-entwheel 31 of. the

threshing machine.

apparent that when the valve 12 is set so as to admit the steam or otherfluid into the cylinder, the piston will he forced rcarwardly t ereby,against the action of the coil-s ring, thus rocking the lever 16 uponits fu crnzn and advancing the" link 18, such movement of the latterapplying the brakes, as is obvious. In releasing the brakes it is onlynecessary to reverse the position of the valve, whcreu Jon the pistonwill be advanced within the cy inder, by reason of the pressure of thecoilspring, thus swinging the lever 16 in the op posits direction andinovin the brake-shoes hand.

While the invention has been shown and described inconnection with athreshing machine, it is obvious that it may be applied with equalfacility to any machine of s, similar nature which is adapted to bepropelled by a traction engine.

' What is claimed, is,

Thc'combination, withs traction engine and a wheeled machine pro )elledthereby, of a horizontally disposed cylinder supported cured tothe'machine, the forward head of the cylinder having an inlet port aiidthe rear head thereof a bearing formed therein; a hose section havingone end. fitted in said port, and its opposite end connected to amunicating with a source of fluid under pressure for admitting the fluidinto the interior of the cylinder when the valve is in one position; itpiston slideble within'the cylinder and adapted to be forced rearwardwitherespect to the machine, upon the admission of the fluid into thecylinder, the stern of the piston projecting through. the bearing in therear head of the cylinder; at horizontally-dis posed lever pivotedintcrmedicteits ends to the machine and towards its outer end to theprojecting end of the piston stem a link pivoted at its forward end tothe inner end of said horizontal levpr; a brske-heain secured mounttherefrom, and set the brakes by valved pipe carried by the engine and00111-- From the foregoing description it will be I upon a-front and arear pair of brackets posed upon opposite sides thereof and, se

-Wheel of the machine when the piston is force the piston forwardly ofthe machine when the valve is in its second position, to 10 release thebrake shoes from engagement with the wheel. f

- In testimony whereof, I afiix my signature,

in presence of two witnesses.

JOSE PH E. FROST.

to the rear end of the link and provided at each end with a brake-shoeadapted to be forced into engagement with the adjacent moved rearwardlyin the cylinder; and a retraotile coil-sprin secured at one end to theouter end of said orizontai lever, and at the other end to the adjacent;rear bracket, to

Witnesses:

ANTON ROsENBERG, ROBERT P. PEARSON.

